Ordered mesoporous NiCoMnO4: synthesis and application in energy storage and catalytic decomposition of N2O

Abstract

Ordered nanocrystalline mesoporous NiCoMnO₄ samples were prepared using mesoporous silica (KIT-6) as a hard template, and characterized by Powder X-Ray Diffraction (PXRD), Transmission Electron Microscopy (TEM), Energy Dispersive X-ray Spectroscopy (EDX), and N₂ adsorption–desorption. The average crystal sizes and textural properties of mesoporous NiCoMnO₄ could be tuned by varying the annealing temperature (200–800 °C) during the synthesis. The applications as an electrochemical capacitor and in catalytic decomposition of N₂O were demonstrated. Mesoporous LiNi_1/3Co_1/3Mn_1/3O₂ was further prepared by reacting mesoporous NiCoMnO₄ with LiOH at 400 °C, and its application as a cathode material for Li-ion batteries was demonstrated.